---
title: IRibbonExtensibility Members (Office)
ms.prod: office
ms.assetid: 8d8ecf4f-5502-1876-46af-381078c7710e
ms.date: 06/08/2017
---


# IRibbonExtensibility Members (Office)
The interface through which the Ribbon user interface (UI) communicates with a COM add-in to customize the UI.

The interface through which the Ribbon user interface (UI) communicates with a COM add-in to customize the UI.


## Methods



|**Name**|**Description**|
|:-----|:-----|
|[GetCustomUI](iribbonextensibility-getcustomui-method-office.md)|Loads the XML markup, either from an XML customization file or from XML markup embedded in the procedure, that customizes the Ribbon user interface.|

